Metallic alloy



UNITED STATES RATENT OFFICE.

AMBROSE J. MANIDELL, OF MORRISTOWN, NEW JERSEY, ASSIGNOR TO ELECTRICALALLOY COMPANY, OF MORRISTOWN, NEW JERSEY, A CORPORATION O I NEW PatentedJan. 17, 1922.

JERSEY.

METALLIC ALLOY.

1 403 558 Specification of Letters Patent.

No Drawing.

To all whom it may concern:

Be it known that I, AMBROSE J. MANDELL, a citizen of the United States,residing at Morristown, in the county of Morris and State of New Jersey,have invented certain new and useful Improvements in Metallic Alloys, ofwhich the following is a specification.

This invention relates .to an improved metal alloy, and has for itsprimary object Nickel 404557;, Copper 2030% Iron 02-15% Manganese 02-25%Metal alloy having the metallic ingredients in the relative proportionsspecified has higher electrical resistant properties than what is knownas Monel metal, upon which my invention is an improvement. I have foundthat the electrical resistance of Monel metal is very little affected byrela tively great changes in the proportions of nickel and copperpresent in the alloy, but is very greatly affected by smallvariations 1nthe percentages of iron, manganese and similar metals, which are usuallypresent in quantities not exceeding 2%.

Therefore, by increasing the iron or manganese content or both insuitable proportions, Ihave found that the electrical resistance of theresultant alloy may be greatly increased. Either iron or manganese maybe added alone, or commercial ferromanganese of suitable percentages maybe added, depending on the properties desired in the resulting alloy.

The addition of iron greatly increases the electrical resistance of theresultant alloy,

Application filed January 29, 1920. Serial No. 354,889.

alloy but does not greatly change the resistance to corrosion.Therefore, very much more manganese than iron may be added withoutmaking the alloy too difiicult to work.

Monel metal possesses the following constituents in approximately theproportions set forth:

Nickel 67% Copper 28% Iron and manganese 5% I have found wide variationsin the electrical resistance of Monel metal due to nonuniformcomposition and that such variations can be almost eliminated in thealloy produced after the addition of iron, manganese or ferromanganesein "quantities calculated from the composition of the Monel metal used,so as to have the percentages of iron and manganese in the resultingalloy, constant within limits.

The percentage of iron which may be allowed in the resulting materialafter proper additions, without making the alloy too hard and brittlefor working by customary methods is 15%, while the percentage ofmanganese which may be allowed is 25%.

After adding iron, manganese or ferromanganese to the Monel metal, forthe purpose of increasing the electrical resistance, a series of alloyscan be produced having specific electrical resistance in excess of 300ohms per circular mil-foot, and in some cases in excess of 500 ohms percircular milfoot, and the alloys are very strong, can be worked byordinary and well-known metalworking methods, can be easily cast, andhave properties very similar to those of Monel metal with regard toresistance to corrosion, erosion and oxidation, besides having a muchgreater electrical resistance than that of Monel metal.

Such series of alloys I have found possess high electrical resistancevarying from approximately 30 to 50 times that of copper, depending onthe composition; high tensile strength, when drawn, being in excess of Imight make it desirable,

purposes, although manifestly it may be put,

to mechanical purposes where circumstances since the resulting alloy maybe cast, drawn, rolled, forged or machine and possesses in additiongreat strength, non-corrodibility and durability.

Havmg thus described my invention what I claim as new herein and desireto secure by Letters Patent is:

1. An alloy for electrical-resistance elements consisting of nickel,copper, iron, and manganese, the iron content being greater than 2% andthe manganese content being within the limits of 2% and 25% by weight.

2. An alloy for electrical-resistance elements consisting of nickel,copper, manganese, and iron, the manganese content being greater than 2%and the iron content being within the limits of 2% and 15% by weight.

3. An alloy for electrical-resistance elements consisting of copper,iron, manganese and nickel, the iron andmanganese content being eachgreater than 2% and the nickel content being withinthe limits of 40% and65%by weight.

4. An alloy for electrical-resistance elements consisting of nickel,iron, manganese, and copper, the combined iron and manganese contentbeing not less than 5% and the copper being within the limits of 20% and30% by weight.

5. An alloy for electrical-resistance elements consisting of nickel,copper, from-2% to 15% by weight of iron and 2% to 25% by weight ofmanganese.

6. An alloy for electrical-resistance elements consisting of nickel,from 20% to 30% by weight of copper, 2% to 15% by weight of iron and 2%to 25% by weight of manganese.

7. An alloy for electrical-resistance ele ments consisting of copper,from 40% to 65% by weight of nickel, 2% to 15% by weight of iron and 2%to 25% by weight of manganese.

8. An alloy for electrical-resistance elements consisting of from 40% to65% by weight of nickel, 20% to 30% by weight of copper, 2% to 15% byweight of iron and 2% to 25% by weight of manganese.

9. A composition of matter consisting of copper, iron, manganese and notmore than 65% by weight of nickel, the combined percentage of iron andmanganese being not less than 5%. r

10. A composition of matter consisting of nickel, copper, iron andmanganese, the latter exceeding 2% by weight and-the combined percentageof manganese and iron being not less than 5%.

11. A composition of matter consistingof nickel, copper, manganese andiron, the lat ter exceeding 2% by weight and the combined iron andmanganese content being not less than 5%.

12. A composition of matter consisting of nickel, copper, iron andmanganese, the iron being equal to about 2% or more and the manganeseexceeding 2% by weight but not exceeding 25% by weight.

13. A composition of matter consisting of nickel, copper, manganese andiron, the manganese being equal to about 2% or more and the ironexceeding 2% but not exceeding 15% b weight. I

14. Zn alloy consisting of nickel, copper, iron and manganese, thepercentage by weight of the latter two combined being from 5% to 40%,but neither less than 2%,

ing of nickel not greater than 65% by weight, copper not greater than30% by weight, iron not greater than 15% by weight, and manganese notgreater than 25%" by weight, neither the iron nor the manganese beingless than 2% and the combined per- 1 centage thereofbeing not less than5%.

17. An electrical-resistance alloy consisting of nickel, copper, ironand manganese the nickel and copper combined being not less than 60% byweight and not more than 1 95% by weight, the iron and manganesecombined being greater than 4% by weight and not more than 40% byweight.

18. An alloy similar to Monel metal but having higher than that of Monelmetal up to about 500 ohms per circular mil-foot, said alloy beingcomposed of nickel, copper, manganese and iron, the combined percentageof mananese and iron being greater than that of 12 loiiel metal andequal to a value dependent upon the resistivity desired tobe obtained,at least one of said last-mentioned ingredients being present to a valuenot less than any desired electrical resistivity 19. An alloy havinghigh resistivity to the 20. An alloy composed of the sameingreelectrical current and composed of nickel, clients as Monel metaland having substancopper, manganese and iron, the percentage tially thesame properties, but containing 10 of manganese and iron combinedexceeding iron and manganese together in proportion that of Monel metalby a quantity dependent above that of Monel metal to render the upon theelectrical resistivity Which it is alloy of high resistance toelectrical current. desired to impart to the alloy. AMBROSE J. MANDELL'.

